Pulsators



Jan. 29, 1957 1. M. PETERSIME PULSATORS 2 Sheets-Sheet 1 Filed Jan. 6, 1955 INVENTQR Ira M Peterslme ATTORNEY Jan. 29, 1957 Filed Jan. 6, 1955 1. M. PETERSIME 2,779,264

PULSATORS 2 Sheets-Sheet 2 INVENTOR IRA M Pzn zsuna ATTORNEY and bottom members 46 and 48. Doors, such as 50, are positioned in the side wall, and generally practically the whole side wall can be opened. The pulsator is shown mounted on wall 40; A motor for driving shaft 30 can be mounted outside the incubator.

Figure 3 shows the pulsator mounted closely adjacent -Wall 40. Shelves 52 are connected to uprights 56 and the trays containing the eggs are supported on the shelves.

The trays normally comprise wire screen to facilitate the passage of air through the incubator. Ordinarily the pulsator would be mounted in an incubator in the manner shown. Figures 4, 5 and 6 serve to illustrate the operation of the pulsator and the air currents which are generated. Injthese figures the pulsator is rotating counterclockwise. In Fig. 4 there is shown a general centrifugal movement of air created by the rotating movement of the pulsator. vSuch centrifugal movement is common to many fans. Figure 5, however, illustrates a movement of air which .is not common to fans. It is seen that with counterclockwise rotation the upper and lower blades 22 and 24 will cause movement of air toward the wall 40, but that the -horizontally disposed blades will direct the air outwardly from the wall. These latter two described movements might be referred to as push and pull movements with the vertically disposed blades pulling the air toward the wall and the horizontal blades pushing the air outwardly. It is seen that the pulsator blades are not enclosed in a housing.

Figure 6 shows the effect obtained through combining the two air movements illustrated in Figs. 4 and 5, respectively. It is seen that the two air movements merge to produce a type of air movement resulting in complete diffusion throughout the incubator. The movements .combine to produce a pulsating action which reaches into every corner of the incubator. There is no forced draft or harsh blast of air such as comes from an ordinary propeller-type fan. The push-pull movement is readily noticeable adjacent the pulsator. Ribbons or candle flames can be used to illustrate this action. The movement is particularly apparent in the portions of the blades nearer the center of rotation.

The air impelling or movement imparting surfaces of the blades are seen to be positioned to follow each other in an annular path as they rotate. The normal direction of rotation is indicated by the arrow 58 in Figure 1.

It is apparent that some modifications may be made in the herein disclosed device. While there are shown plain flat bladed elements 22 to 25, blades of a different shape may be substituted. However, it is important that the air movement imparting faces be formed and arranged to produce the effects described. Also, a different number of blades may be employed than what is shown herein.

With the herein described pulsator, improved incubationgsettings are obtained. The air which is introduced and withdrawn by other means or by action of the pulsator is moved gently in and out of the egg trays. Localized temperature differences are thus obviated. The incubator is normalized. There is no forced draft or blast against one side of the eggs, as would occur with -a uni-directional fan. Mild .breathing air can be supplied to all sides of the eggs within an incubator efiiciently and economically.

While I have shown and described a preferred form of my invention, it will be understood that variations in details of form may be made without departure from .the invention as defined in the appended claims.

Iclaim:

- 1. A pulsator for incubators, comprising a wheel having a central hub, a rim, spaced arms interconnecting said rim and hub, angle brackets mounted on each of said arms, some of said arms being diagonally opposite other of said arms, each of said brackets having a base leg and an angularly disposed leg connected thereto, the angularly disposed legs of the brackets on diagonally opposite arms being disposed at an angle with respect to each other, and a blade connected to the last named legs of the brackets mounted on each of said arms, said blades comprising fiat substantially straight elements, the blades connected to diagonally opposite arms of said wheel extending at an angle to each other with some of said blades facing in a first direction axially of said wheel and with respect to said rim, with some of said blades facing in a direction opposite said firstdirection.

2. A pulsator comprising a shaft, a wheel rotatably mounted on said shaft, spaced blades fixedly mounted on said wheel and extending substantially radially outward of the axis of rotation of said wheel, said blades having flat sides inclined with respect to said axis and adapted to impart movement to the ambient atmosphere upon rotation of said wheel, with the fiat sides of alternate blades facing in one direction parallel to said axis of rotation and with the flat sides of the other blades facing in another direction parallel to said axis of rotation, each of said blades having a longitudinal central axis with the longitudinal central axis of all the blades lying in a common plane said blades being positioned to follow each other in an annular path as said wheel rotates.

3. A pulsator comprising spaced pairs of diagonally opposed blade-like elements rotatably supported for movement about an axis of rotation, said elements having fiat sides for imparting movement to air, said sides extendng substantially radially outward of said axis of rotation with alternate pairs of blades having their said sides facing in one direction parallel to said axis of rotation and with the other pairs of blades having their said sides facing in another direction parallel to the said axis of rotation, each of said blades having a longitudinal central axis .with the longitudinalcentral axis of all the blades lying .in a common plane said elements being positioned to fol- .extending radially outward of said wheel along one side thereof, said blades having surfaces for imparting movement to air as said wheel rotates, said surfaces of alternating blades facing in one direction parallel to the axis of rotation of said wheel and the said surfaces of the other blades facing in an opposite direction parallel to said axis said blades being positioned to follow each other in an annular path as said wheel rotates.

5. A pulsator for incubators comprising a wheel, means for rotatably mounting said wheel in an incubator, blades fixed to said wheel and having surfaces positioned to impart movement to air as said wheel rotates, the said surfaces of some of said blades facing towards one end of the axis of rotation of said wheel and the said surfaces of the other blades facing in an opposite direction parallel to said axis said blades each being positioned to follow each other in an annular path as said wheel rotates.

6. A pulsator comprising a rotatable member, means for mounting said member for rotation about an axis within an incubator, blades fixed to the said member each -of said blades having surfaces extending radially outwardly from the axis of rotation of said member, said surfaces of some of said blades being positioned to' impart movement to air as said member rotates and to face -toward one end'of said axis, the surfaces of the other blades being positioned to impart movement to air as 'said member rotates and to face toward the other end surface, said wheel having a rim and an axis of rotation;

arvaaea said blade air impelling surfaces facing in the normal direction of rotation of the rim of said pulsator, but with the air impelling surface of each blade being disposed radially of said rim and at an angle of less than 90 with respect to the plane of said rim, with each blade having its air impelling surface facing axially with respect to said wheel in a direction opposite the direction the corresponding surfaces of the next adjacent blades face, and said blades having their said air impelling surfaces positioned to follow each other in an annular path as said wheel rotates about said axis.

8. A pulsator comprising a rotatably mounted base, angle brackets connected to said base at spaced points, blades attached to said angle brackets and radially disposed with respect to said base, said blades being arranged in diagonally opposed pairs, each blade of a pair having an impelling surface, the impelling surface of each blade facing axially with respect to said base in a direction opposite the direction the corresponding surfaces of the next adjacent blades face, the said air impelling surfaces of the blades being positioned to follow each other in an annular path as said wheel rotates.

9. A device for imparting movement to the atmosphere within an incubator comprising a rotatably mountable member adapted to rotate about an axis, spaced elements connected to said member, said elements having faces positioned to strike said atmosphere as said member rotates, the faces of alternate of said elements being positioned to impart movement to the atmosphere in one direction parallel to the axis of rotation of said member, the faces of the others of said elements being positioned to impart movement in the opposite direction, said faces being positioned to follow each other in an annular path as said member rotates.

10. A device for imparting movement to the atmosphere within an incubator comprising a rotatably mountable member adapted to rotate about an axis, spaced elements connected to said member, said elements having faces positioned to strike said atmosphere as said member rotates, the faces of alternate of said elements being po sitioned to impart movement to the atmosphere in one direction parallel to the axis of rotation of said member, the faces of the others of said elements being positioned to impart movement in the opposite direction, said elements having radially outer portions which are equidistant from the axis of rotation of said member.

11. A device for imparting movement to air Within an incubator comprising a rotatably mountable member having a normal rotational axis, blades connected to said member and projecting radially outwardly from the said normal rotational axis, said blades having air impelling surfaces positioned to impart movement to air as said member rotates, with alternate blades having their air impelling surfaces facing in opposite directions along the axis of rotation of said member, the said air impelling surfaces of the blades being positioned to follow each other in an annular path as said wheel rotates.

12. A device for imparting movement to air within an incubator comprising a rotatably mountable member having a normal rotational axis, blades connected to said member and projecting radially outwardly from the said normal rotational axis, said blades having air impelling surfaces positioned to impart movement to air as said member rotates, with alternate blades having their air impelling surfaces facing in opposite directions along the axis of rotation of said member, said blades having radially outer portions which are equi-distant from the rotational axis of said member.

References Cited in the file of this patent UNITED STATES PATENTS 668,840 Meier Feb. 26, 1901 1,026,923 Ownby May 21, 1912 1,672,272 Moore June 5, 1928 2,074,387 Gill Mar. 23, 1937 2,654,345 Edwards Oct. 6, 1953 FOREIGN PATENTS 733,691 France July 12, 1932 

